Scotland boss Andy Robinson labelled their defeat to Tonga "unacceptable" and vowed that there "will be consequences".

Scotland fell 21-15 to Tonga in Aberdeen and failed to cross the tryline while the away side bagged two through Lua Lokotui and Fetu'u Vainikolo along with 11 points from the boot of Fangatapu Apikotoa which was enough to earn Tonga a memorable win at Pittodrie.

Greig Laidlaw kicked five penalties for Scotland, who were blunt in attack, as Robinson's men slumped to a third defeat of the autumn following losses to New Zealand and South Africa.

Scotland, whitewashed in the Six Nations, have now lost 10 of their past 13 Tests. Asked about his own future, Robinson said: "We'll look at everything. That was a totally unacceptable performance we've witnessed today.

"From my side I'm very angry. There will be consequences because of this performance. I won't go through yet what those will be."

Robinson added: "We knew that was going to be a tough game. They tackled well; they dominated the tackle contest. The penalty count was high so it became a disjointed game. We got over the line twice with a maul, but you've got to get the ball down.

"You've got to be able to control the scoreboard in these games. Unfortunately it became a fight and a mess. We weren't very good in the mess."

Scotland had opportunities and Robinson refused to criticise the decisions of captain Kelly Brown to spurn penalty kicks at goal in order to heap pressure on the Tonga line. He did, though, lament the inability to convert the pressure into points.

"When we get over the line, we've got to score," he said. "It's about executing under pressure. We didn't do that."

Flanker Brown said: "It's about taking our chances. That's something I'll be looking at as the captain. The coaches aren't out there on the pitch; it's up to the players. We have spoken already that we need to look inside ourselves and we all need to look for answers."